Ian K said..
Why don't they pedal the grinders? Against the rules?

interesting indeed concept...much more power that cranking by hand... but on another hand designers possibly didn't saw that lack of control power as limiting factor in first place.
As mentioned above there are more and more surfaces that could be alternated and controlled and one with the tilting mast/wing to the sides , could be one of them but definitely cranking by hand will not be sufficient...
Possibly dilemma if that competition is about human strength / endurance or boat ideal design is not yet solved.
Next problem is crew running from side to side. At this speeds is become dangerous. So next design could incorporate maybe permanent sits for whole crew with ability to move them from side to side if their mass still could do any difference at rising area surfaces.

Wasn't race 10 just the best sailing you have ever seen on TV?????????

Darkspi said..

just me but i wouldn't think tilting the mast would be practicable. Think telescoped opposition hydrofoil _|__ __|_ where the outter hydrofoil could be telescoped back in to the main one to adjust for lean

IMO the opposite hydrofoil could be used as "counterweight" when submerged, pulling flying in the air hull close to water again.
But that need further increase of the wing sail area or stronger wind to compensate for increased water resistance.
I guess simple model simulation could answer if there is additional gain in the delicate balance between sail size and boat stability.
At this moment looks like maximum power is limited gravity alone and further progress could be made only by increasing beam _ boat width.

evlPanda said..

Quick reflex on Oracle !

1500 $ vs 15 000 000 $

seanhogan said..

1500 $ vs 15 000 000 $

seanhogan said..

1500 $ vs 15 000 000 $

"How many Guys can say " Hey I've beaten Kai Lenny " forget about the stuff we're using " We may be barracking for the Kiwis but the Oracle skipper comes with with some good lines.

How do they maintain a steady attitude when the hulls are out of the water? Is there an adjustable horizontal underwater surface that must be constantly trimmed?

Harrow said..

How do they maintain a steady attitude when the hulls are out of the water? Is there an adjustable horizontal underwater surface that must be constantly trimmed?

I find I keep a steady attitude by being mentally prepared.

PS - they can trim the foils tilt forward or back and I think they've worked on the angle of the foil to improve the upwind performance. It's the same principle with the foiling moths only on a much grander scale. There's a vid I posted on the first page that succinctly explains all.

There is inheritant danger associated with hydrofoils.
I thought about this problem when trying to convert my electric catamaran on hydrofoil .
When you hit any obstacle floating in he water (log, buoy, tree) or even sandbank ( on our G.C) something must give up, but such failure could be catastrophic.
Flying debris could knife the crew easy. Unlike ordinary hull design that slide over hydrofoils works like hooks.

you'd need A² or Bjorn to compete with those speeds, not a featherweight like Kai.....

How do I watch the race in the morning? Is there a live internet broadcast somewhere?

Harrow said...
How do I watch the race in the morning? Is there a live internet broadcast somewhere?

Just click on evlpanda's link in his original post at 6 tomorrow morning. Hit the live link for races 11 & 12.

D Day for OTUSA.

EDIT - better still here's the link

Just make sure you watch the racing first before reading about the result here.

I never would have thought I would be wishing for the wind to die down. Ted, you must be a basket case

Harrow said..

Cancelled due to 'high' winds? How can 20 knots be the upper limit? We usually sit on the beach waiting until the NE builds to 20 knots!

Would have been the most exciting race day so far.

If you had been following the LV Cup, all the teams agreed on reducing the upper wind limit from 33knots to 23knots (which gets adjusted due to tidal flow) after Artemis flipped and British sailor Andrew Simpson was killed. I'm sure they all want to race but safety comes first and fore most for event organisers.


www.bloomberg.com/news/articles/2013-05-09/british-sailor-simpson-dies-in-america-s-cup-training-accident

noticeboard.americascup.com/wp-content/uploads/2013/06/RN189-USCG-Event-Permit.pdf
noticeboard.americascup.com/wp-content/uploads/2013/06/SF-13-1035-1039.pdf